The results showed thattheUnited States Pharmacopoeia (USP) theoretical plates of all analytes
were greater than 19,000, the USP resolution between any two compounds was greater than 1.5, and the peak asymmetry for all the analytes was between 0.93 and 1.16 (Table 1). Specificity studies were also performed on the forced degradation solutions of VTXT. The peak purity test was carried out with a PDA detector, and the results showed that there is no merging of any known peak with any unknown peak.